The first time I ever saw V. pellucens it was on Bramble blossom, with lots of other hoverflies. Bramble has yielded almost nothing this year, suggesting that it has not been a good year for it in terms of nectar production (or pollen?). I'm aware that Hawthorn nectar can vary significantly from year to year but I know of little research on this topic. I suspect that figures on nectar yields on a yearly basis could tell us a lot about the scarcity or otherwise of hoverflies.

Last year when I first got some time to get interested in insects (due to prolapsed disk) they seemed everywhere but this year not just hoverfly’s but all insects seem not to be so abundant,. I have not noticed a decline in any particular flowers but it is a good point and worth noting

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